Semantic Data Delivery Without CRC Retransmission Overhead
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Solution Overview
Problem
In data transmission between transmit and receive end devices, existing methods discard or wait for retransmission of data when cyclic redundancy check (CRC) fails, which is inefficient for scenarios requiring error tolerance, especially in semantic communication, where meaning is not bit-level accurate.
Innovation Solution
Implementing a method and apparatus that allow erroneous data transmission or delivery, by not performing CRC on the first data, and using error-tolerant verification methods, such as predefined or agreed verification methods, to ensure error-tolerant transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CRC check is performed on transmitted data to ensure accuracy, then data transmission reliability is improved, but data delivery efficiency deteriorates due to delivery failures and retransmissions
Solution Approach 1:
The patent applies different quality requirements to different parts of the communication system by implementing error tolerance at the semantic layer while maintaining traditional CRC checks at the physical layer. This allows critical control data to be transmitted with high reliability while permitting semantic data to be delivered efficiently even with errors, resolving the contradiction between reliability and efficiency through localized quality differentiation.
2Measurement precision
If CRC check is performed on every data packet, then transmission accuracy is improved, but transmission overhead increases
Solution Approach 1:
The patent implements partial action by applying CRC checks only where necessary (control plane data, critical user plane data) while omitting them for semantic data that can tolerate errors. This selective application of CRC checks reduces overall transmission overhead while maintaining accuracy for critical data, resolving the contradiction between precision and quantity.
3Reliability
If data is discarded or retranmitted when CRC fails, then data integrity is maintained, but transmission latency increases
Solution Approach 1:
The patent inverts the traditional approach by not discarding or retransmitting semantic data even when errors occur. Instead of treating all data equally with strict integrity requirements, the system allows erroneous delivery of semantic data while maintaining integrity for control data. This inversion resolves the contradiction by accepting time loss for non-critical data while preserving integrity for critical data.
Data Source
AI summary
This application discloses a communication method and apparatus. The method includes: A terminal device receives first data. The first data is data of a first service, the first service is a service that allows erroneous data transmission or delivery, and CRC is not performed on the first data. The terminal device delivers the first data carried on a first logical channel. In the method, before the first data is delivered, CRC may not be performed on the first data. According to the method, even if an error occurs during transmission of the first data, erroneous delivery of the first data is still performed. Compared with performing CRC on the first data before delivery, this can avoid a delivery failure of the first data caused by an error in the first data, to obtain an error-tolerant transmission gain of the data.